Mixer with vertically movable bowl support and means for preventing removal of said bowl during a mixing process

• US 5,472,276 A
• Filed: 09/30/1994
• Issued: 12/05/1995
• Est. Priority Date: 03/30/1992
• Status: Expired due to Fees

• Current Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Original Assignee: Premark FEG LLC (Illinois Tool Works Inc.)
• Inventors: Redman, Randall L., Best, Gary M., Kitchen, Charles N., Ratermann, Philip A.
• Primary Examiner(s): Scherbel, David
• Assistant Examiner(s): Cooley, Charles E.
• Application Number:
  US08/313,265
• Time in Patent Office: 431 Days
• Field of Search: 366/96-98, 366/197-198, 366/203, 366/207, 366/288, 366/347, 366/279, 99/348
• US Class Current: 366/203
• CPC Class Codes: A21C 1/02 with vertically-mounted tools; Machines for whipping or beating
• CPC Class Codes: B01F 27/805 wherein the stirrers or the receptacles are moved in order to bring them into operative position; Means for fixing the receptacle
• CPC Class Codes: B01F 35/60 Safety arrangements

Abstract

A food mixer comprises a base, a supporting structure or column upstanding from the base and an arm projecting from the upper end of the column and carrying a mounting member for a mixing tool. The column is provided with a vertically extending V-section channel on its bowl-facing side which, in use, receives part of the periphery of the mixing bowl so that the necessary horizontal extensions of the head from the column is minimized. The mixing bowl is supported on a mixing bowl support vertically movable on the column to bring the bowl up to the mixing tool and lower the bowl therefrom. Except in the fully lowered position of the bowl support, the bowl is held captive on the bowl support by a pin which is extended upwardly through a hole in a flange of the bowl, the flange being received in a slot in the bowl carrier. The pin is carried by a lifting mechanism for the bowl support and is arranged with a degree of vertical lost motion relative to the bowl support, thus ensuring that the bowl is automatically locked into the bowl support before any lifting movement takes place and is not released until the bowl support has been fully lowered.

Claims

1. A food mixer comprising:

a base,

a supporting structure upstanding from the base, the supporting structure having an upper portion,

mounting means at the upper portion of said supporting structure, said mounting means being capable of movably supporting a mixing tool which extends downwardly from said mounting means when said mixing tool is supported on said mounting means,

a drive system for driving said mounting means, whereby said mixing tool can extend downwardly from said mounting means into a bowl of a flowable food product and can be driven, by said drive system to execute a mixing movement in said food product relative to said bowl,

and wherein said supporting structure is provided with a substantially V-shaped recess which faces towards said mounting means, said recess being adapted to receive part of a periphery of a bowl so that a bowl would be positioned for mixing of the food product therein by said mixing tool.

2. A mixing machine comprising:

a mixing bowl having a periphery;

a bowl support having a horizontally extending slot;

a generally horizontal flange extending from said periphery of said mixing bowl for engagement in said slot in said bowl support, said flange having a hole extending vertically therethrough; and

a pin mounted in said bowl support for vertical movement relative to the bowl support such that when said mixing bowl is positioned in said bowl support, said flange extends into said slot and said hole is in vertical alignment with said pin and such that the pin can move between a first position wherein said pin is withdrawn from said slot and a second position wherein said pin extends into said slot and through said hole in said flange when the bowl is engaged in said bowl support, thereby preventing removal of said bowl from said bowl support.

3. A mixing machine according to claim 2 further comprising:

a support frame;

a lifting member coupled with said bowl support and said pin;

wherein said bowl support is mounted on said support frame for vertical movement relative to said support frame by said lifting member for raising of said bowl support into a first position in cooperation with a mixing tool and for lowering said bowl support into a second, retracted position away from said mixing tool,

said lifting member being coupled with said bowl support such that limited lost motion is permitted,

said pin being coupled with said lifting member so as to move therewith, so that said pin extends into said slot and through said hole in said flange when said lifting member is raised and said pin is only retracted from said hole and said slot when the bowl support is completely lowered.

4. A mixing machine according to claim 3 wherein said lifting member is in the form of a vertical rod passing through an aperture in a part of said bowl support and carrying, below said part of said bowl support, an abutment member for engagement with an underside of said part for lifting the bowl support.

5. A mixing machine according to claim 4 wherein said vertical rod carries, above said part of the bowl support, a compression spring acting between said part and an abutment on said rod, said spring serving to keep said part in engagement with said abutment member until, during lowering of the bowl support, the abutment member arrests the lowering movement of the bowl support.